Bug in Double Select

I created a form application and added a field of type “Double Select”. I set this field to be required and have an error message. If I select the double arrow to move all items to the right I have no errors. If I actually select an item (single, double, or all) and then move them to the right. I get the field required error message.

I posted this question back in October with no responses so I thought I would post again.

I created a form application and added a field of type “Double Select”. I set this field to be required and have an error message. If I select the double arrow to move all items to the right I have no errors. If I actually select an item (single, double, or all) and then move them to the right. I get the field required error message. Does anybody have any ideas how to fix the error?

I think you must have some error in your form. I have some forms with double select and they is working fine. Try create it newly.

Could be helpful if you share a sample project replicating this problem. Works for me as expected